py-mpi4jax: add new package (#35551)

* py-mpi4jax: add new package
* [@spackbot] updating style on behalf of adamjstewart

---------

Co-authored-by: adamjstewart <adamjstewart@users.noreply.github.com>

var/spack/repos/builtin/packages/py-mpi4jax/package.py

@@ -0,0 +1,31 @@
+# Copyright 2013-2023 Lawrence Livermore National Security, LLC and other
+# Spack Project Developers. See the top-level COPYRIGHT file for details.
+#
+# SPDX-License-Identifier: (Apache-2.0 OR MIT)
+
+from spack.package import *
+
+
+class PyMpi4jax(PythonPackage, CudaPackage):
+    """Zero-copy MPI communication of JAX arrays, for turbo-charged HPC applications in
+    Python."""
+
+    homepage = "https://github.com/mpi4jax/mpi4jax"
+    pypi = "mpi4jax/mpi4jax-0.3.11.post3.tar.gz"
+
+    maintainers("bhaveshshrimali")
+
+    version(
+        "0.3.11.post3", sha256="ad4c5840c81ead40b68f4885d705c06eeca22cd4e998790de589c6566db75a75"
+    )
+
+    depends_on("python", type=("build", "link", "run"))
+    depends_on("py-setuptools@42:", type="build")
+    depends_on("py-cython@0.21:", type="build")
+    depends_on("py-mpi4py@3.0.1:", type=("build", "run"))
+    depends_on("py-numpy", type=("build", "run"))
+    depends_on("py-jax@0.3.25:", type=("build", "run"))
+
+    def setup_build_environment(self, env):
+        if "+cuda" in self.spec:
+            env.set("CUDA_PATH", self.spec["cuda"].prefix)